CN110950514A - Temporary storage treatment method for waste sludge of urban sewage treatment plant - Google Patents
Temporary storage treatment method for waste sludge of urban sewage treatment plant Download PDFInfo
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- CN110950514A CN110950514A CN201911249468.3A CN201911249468A CN110950514A CN 110950514 A CN110950514 A CN 110950514A CN 201911249468 A CN201911249468 A CN 201911249468A CN 110950514 A CN110950514 A CN 110950514A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/32—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses a temporary storage method of waste sludge of a town sewage treatment plant, which is characterized by conveying 60-70% of sludge to a dry sludge storage yard for sedimentation and conveying 70-90% of sludge to a wet sludge storage yard for sedimentation according to the water content of the waste sludge of the town sewage treatment plant; carrying out outward treatment on the sludge with the water content of less than 60% after sedimentation; collecting supernatant obtained after sedimentation to an upper supernatant pool; the supernatant in the supernatant tank is lifted to a small-sized integrated sewage treatment device through a supernatant reflux pump, and the supernatant is purified and returned to a municipal pipe network or used for watering the surrounding green land; and conveying the residual sludge purified by the small-sized integrated sewage treatment device to a wet sludge field pile. The invention ensures that the sludge is stored and reduced safely and environmentally, provides buffer and convenience for subsequent sludge treatment, relieves the pressure of treatment of the waste sludge of the urban sewage treatment plant, and ensures that the structures and the devices can meet the relevant environmental protection requirements, thereby being beneficial to improving the urban environment.
Description
Technical Field
The invention relates to the field of treatment of waste sludge of urban sewage treatment plants, in particular to a temporary storage method of waste sludge of urban sewage treatment plants.
Background
According to the latest published data of the State statistics office, the total population of China reaches 13.95 hundred million by 2018, the urbanization rate reaches 60 percent, and the urbanization proportion of China reaches more than 70 percent in 2035 years, which is estimated to be close to the urbanization rate of the China.
The increasing population base and urbanization rate of China show that a large number of people are flowing into cities from rural areas, which directly leads to the large surge of the number of water consumption of residents. Along with the improvement of the living standard of people, the water consumption per capita is also increased, and in order to adapt to the acceleration of the urbanization process and comply with the current environmental protection requirement and policy, a large number of sewage treatment plants are newly built in the city planning to accept and treat municipal sewage. The production amount of urban sewage is increased year by year, the yield of sludge waste produced by urban sewage treatment plants is increased, and if the sludge waste is not treated in time and is safely disposed, the health of urban residents is seriously threatened.
The sludge treatment method mainly comprises sludge concentration, sludge dehydration, sludge conditioning, aerobic treatment, anaerobic treatment and sludge drying. The main disposal methods of the sludge include sludge composting, sanitary landfill, sludge incineration, sea discharge, land utilization, sludge brick making and the like, but before the sludge is disposed, the water content of the sludge needs to be reduced to below 60%, and the disposal methods such as incineration have higher requirements on the water content of the sludge. However, the water content of the sludge generated by the urban sewage treatment plant is only less than 80% after dehydration, and the requirement of direct disposal cannot be met, meanwhile, the disposal capability of the sludge matched with cities and towns is greatly lagged, and the sludge treatment plant special for cities and towns is difficult to treat the sludge generated by all urban sewage treatment plants and meets the requirement of sanitary and safe disposal, so that a large amount of wet sludge is stored in a refuse landfill or a distributed storage, the risk of secondary pollution is brought to the surrounding environment, and the health of residents is threatened.
Disclosure of Invention
Aiming at the problems, the invention provides a temporary storage and disposal method for waste sludge of a town sewage treatment plant, which ensures that the sludge is stored and reduced safely and environmentally, provides buffer and convenience for subsequent sludge treatment, meets the requirement of environmental protection, can relieve the pressure of the treatment of the waste sludge of the town sewage treatment plant by combining with the new environmental protection technology in recent years, and structures and devices can meet the relevant environmental protection requirement, thereby being beneficial to improving the urban environment.
The technical scheme of the invention is as follows:
a method for temporary storage of waste sludge of a town sewage treatment plant comprises the following steps:
a. according to the water content of the waste sludge of the urban sewage treatment plant, 60-70% of the sludge is transported to a dry sludge storage yard for storage and sedimentation, and 70-90% of the sludge is transported to a wet sludge storage yard for storage and sedimentation;
b. carrying out outward treatment on the sludge with the water content of less than 60% after sedimentation;
c. collecting supernatant obtained after sedimentation to an upper supernatant pool;
d. the supernatant in the supernatant tank is lifted to a small-sized integrated sewage treatment device through a supernatant reflux pump, and the supernatant is purified and returned to a municipal pipe network or used for watering the surrounding green land;
e. and (4) conveying the residual sludge purified by the small-sized integrated sewage treatment device to a wet sludge field pile, and repeating the steps b, c, d and e.
The preferable scheme of the temporary storage method of the waste sludge of the urban sewage treatment plant is that during the sludge storage period, wet sludge at the lower layer and dry sludge at the upper layer which is contacted with air are discontinuously mixed by a crane grab bucket in a dry sludge storage yard, so that the water content of the dry sludge is further reduced; after the water content of the sludge in the wet sludge storage yard is reduced to 60-70% through self gravity sedimentation, the sludge with the water content of 60-70% is transferred to a dry sludge storage yard through a crane grab bucket for storage sedimentation.
The preferable scheme of the temporary storage method of the waste sludge of the urban sewage treatment plant is that the supernatant tank is arranged between the dry sludge storage yard and the wet sludge storage yard, and a supernatant return standpipe is additionally arranged in the wet sludge storage yard.
The preferable scheme of the temporary storage method of the waste sludge of the urban sewage treatment plant is that the supernatant tank is provided with an online liquid level detector and is interlocked with a supernatant reflux pump, the pump is automatically started when the supernatant reaches a high liquid level, and the pump is stopped when the supernatant reaches a low liquid level.
The preferable scheme of the temporary storage method of the waste sludge of the urban sewage treatment plant is that an inlet and an outlet of the small-sized integrated sewage treatment device are respectively provided with an online turbidity meter, the online turbidity meter at the inlet guides the dosing concentration of the small-sized integrated sewage treatment device, and the online turbidity meter at the outlet judges whether the turbidity degree after sewage treatment reaches the standard or not.
The preferable scheme of the method for temporary storage and disposal of the waste sludge of the urban sewage treatment plant is that the dry sludge storage yard and the wet sludge storage yard adopt a frame factory building form, a set of high-energy particle deodorization devices are intensively arranged near the dry sludge storage yard and the wet sludge storage yard, odor gas online detectors are respectively arranged in the dry sludge storage yard and the wet sludge storage yard, forced ventilation is carried out through an exhaust fan when the concentration reaches 0.8 time of the national standard limit value, and the extracted gas is purified by the high-energy particle deodorization devices and then discharged.
The invention has the beneficial effects that:
(1) the dry sludge storage yard and the wet sludge storage yard share a grab crane, a ventilation facility, a small-sized integrated sewage treatment device, a supernatant reflux pump and an efflux pump, so that the investment is greatly reduced;
(2) supernatant produced by the sludge is treated by the small-sized integrated sewage treatment device and then can be discharged to a municipal pipe network or used nearby for green land watering, so that the environmental protection requirement is met, and water resources are saved;
(3) forced ventilation systems are arranged in the dry sludge storage yard and the wet sludge storage yard, and the air in the factory building is purified by adopting a high-energy particle deodorization technology, so that the environmental protection requirement is met, and the atmospheric environment is protected.
(4) The equipment is simple to operate and easy to manage.
Drawings
FIG. 1 is a flow chart of temporary storage of waste sludge from a municipal sewage treatment plant;
FIG. 2 is a schematic diagram of a sludge temporary storage yard process arrangement (elevation data is a reference value)
Detailed Description
The present invention is explained below with reference to fig. 1 and 2:
after sludge is generated by a municipal sewage plant, sludge with the water content of 60-70% after dehydration or treatment is transported into a dry sludge yard by an automobile, sludge with the water content of 70-90% is transported into a wet sludge yard by an automobile or a pipeline, the sludge is further concentrated under the action of gravity to generate supernatant, and the sludge with the water content of less than 60% after sedimentation is transported out;
during the sludge stockpiling period, the dry sludge storage yard discontinuously mixes the wet sludge at the lower layer and the dry sludge at the upper layer which is contacted with air by using a crane grab bucket, so that the water content of the dry sludge is further reduced; after the water content of the sludge in the wet sludge yard is reduced to 60-70% through self gravity settling, the sludge with the water content of 60-70% is transferred to a dry sludge yard through a crane grab bucket for storage and settling, thereby creating conditions for final treatment and disposal of the sludge;
arranging a supernatant tank at the middle position of a dry sludge storage yard and a wet sludge storage yard, wherein the two areas share the supernatant tank and a supernatant reflux pump, the wet sludge storage yard is additionally provided with a supernatant reflux standpipe to facilitate supernatant collection, the supernatant tank is provided with an online liquid level detector which is linked with the supernatant reflux pump, the pump is automatically started when the supernatant reaches a high liquid level, the pump is stopped when the supernatant reaches a low liquid level, the supernatant is lifted to the small-sized integrated sewage treatment device through the supernatant reflux pump, the supernatant can be returned to a municipal pipe network or used for peripheral green area watering after being purified, and meanwhile, the residual sludge after being purified by the small-sized integrated sewage treatment device is conveyed to the wet sludge storage yard and the steps are repeated; an inlet and an outlet of the small integrated sewage treatment device are provided with online turbidity meters, the inlet turbidity meters guide the dosing concentration of the small integrated sewage treatment device, and the outlet online turbidity meters can be used for judging whether the turbidity after sewage treatment reaches the standard or not;
a set of high-energy particle deodorization device is intensively arranged near a storage yard, the storage yard is in a frame factory building form, odor gas online detectors are arranged in factory buildings of a dry sludge storage area and a wet sludge storage area, when the concentration reaches 0.8 times of the limit value of the national standard, a chain exhaust fan carries out forced ventilation, and the extracted gas is purified by the high-energy particle deodorization device and then discharged, so that the influence on the surrounding atmospheric environment is reduced and eliminated.
Claims (6)
1. A method for temporary storage of waste sludge of a town sewage treatment plant is characterized by comprising the following steps:
a. according to the water content of the waste sludge of the urban sewage treatment plant, 60-70% of the sludge is transported to a dry sludge storage yard for storage and sedimentation, and 70-90% of the sludge is transported to a wet sludge storage yard for storage and sedimentation;
b. carrying out outward treatment on the sludge with the water content of less than 60% after sedimentation;
c. collecting supernatant obtained after sedimentation to an upper supernatant pool;
d. the supernatant in the supernatant tank is lifted to a small-sized integrated sewage treatment device through a supernatant reflux pump, and the supernatant is purified and returned to a municipal pipe network or used for watering the surrounding green land;
e. and (4) conveying the residual sludge purified by the small-sized integrated sewage treatment device to a wet sludge field pile, and repeating the steps b, c, d and e.
2. The method for temporary storage and disposal of the waste sludge of the urban sewage treatment plant according to claim 1, wherein during the sludge stockpiling period, the dry sludge yard intermittently mixes the wet sludge at the lower layer and the dry sludge at the upper layer which is contacted with air by using a crane grab bucket, so as to further reduce the water content of the dry sludge; after the water content of the sludge in the wet sludge storage yard is reduced to 60-70% through self gravity sedimentation, the sludge with the water content of 60-70% is transferred to a dry sludge storage yard for storage sedimentation through a crane grab bucket.
3. The method for temporary storage and disposal of waste sludge of urban sewage treatment plants according to claim 1, wherein the supernatant tank is arranged at a position intermediate between a dry sludge storage yard and a wet sludge storage yard, and a supernatant return standpipe is additionally arranged at the wet sludge storage yard.
4. The method for temporary storage and disposal of waste sludge of urban sewage treatment plants according to claim 1, wherein the supernatant tank is provided with an online liquid level detector and is interlocked with a supernatant reflux pump, the pump is automatically started when the supernatant reaches a high liquid level, and the pump is stopped when the supernatant reaches a low liquid level.
5. The method for temporary storage and disposal of waste sludge of a town sewage treatment plant according to claim 1, wherein an inlet and an outlet of the small-sized integrated sewage treatment device are respectively provided with an online turbidity meter, the online turbidity meter at the inlet guides the dosing concentration of the small-sized integrated sewage treatment device, and the online turbidity meter at the outlet judges whether the turbidity after sewage treatment reaches the standard or not.
6. The method for temporary storage and disposal of waste sludge of urban sewage treatment plants according to claim 1, wherein the dry sludge yard and the wet sludge yard are in a frame factory form, a set of high-energy particle deodorization devices are intensively arranged near the dry sludge yard and the wet sludge yard, odor gas on-line detectors are respectively arranged in the dry sludge yard and the wet sludge yard, forced ventilation is performed through an exhaust fan when the concentration reaches 0.8 times of the national standard limit value, and the extracted gas is purified by the high-energy particle deodorization devices and then discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911249468.3A CN110950514A (en) | 2019-12-09 | 2019-12-09 | Temporary storage treatment method for waste sludge of urban sewage treatment plant |
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| CN201911249468.3A CN110950514A (en) | 2019-12-09 | 2019-12-09 | Temporary storage treatment method for waste sludge of urban sewage treatment plant |
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| CN110950514A true CN110950514A (en) | 2020-04-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| CN105923974A (en) * | 2016-06-20 | 2016-09-07 | 宿州市皖神面制品有限公司 | Method for treating sludge produced in treatment of cereal deep processing wastewater |
| CN106904800A (en) * | 2015-12-23 | 2017-06-30 | 沈阳铝镁设计研究院有限公司 | A kind of method for disposing the sludge that aluminum oxide factory production waste water is produced |
| CN209039314U (en) * | 2018-09-12 | 2019-06-28 | 浦华控股有限公司 | A kind of sludge dewatering sedimenting system |
| CN110028216A (en) * | 2019-04-01 | 2019-07-19 | 湖北工业大学 | A kind of silt sludge fast dewatering method based on penetrating passage |
-
2019
- 2019-12-09 CN CN201911249468.3A patent/CN110950514A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105293845A (en) * | 2015-10-26 | 2016-02-03 | 广州立白企业集团有限公司 | Treatment method for sludge reduction |
| CN106904800A (en) * | 2015-12-23 | 2017-06-30 | 沈阳铝镁设计研究院有限公司 | A kind of method for disposing the sludge that aluminum oxide factory production waste water is produced |
| CN105923974A (en) * | 2016-06-20 | 2016-09-07 | 宿州市皖神面制品有限公司 | Method for treating sludge produced in treatment of cereal deep processing wastewater |
| CN209039314U (en) * | 2018-09-12 | 2019-06-28 | 浦华控股有限公司 | A kind of sludge dewatering sedimenting system |
| CN110028216A (en) * | 2019-04-01 | 2019-07-19 | 湖北工业大学 | A kind of silt sludge fast dewatering method based on penetrating passage |
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